Github user bogdanrdc commented on a diff in the pull request:
https://github.com/apache/spark/pull/18086#discussion_r118661387
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/hints.scala
---
@@ -25,7 +25,7 @@ import org.apache.spark.sql.internal.SQLConf
* should be removed This node will be eliminated post analysis.
* A pair of (name, parameters).
*/
-case class UnresolvedHint(name: String, parameters: Seq[String], child:
LogicalPlan)
+case class UnresolvedHint(name: String, parameters: Seq[Any], child:
LogicalPlan)
--- End diff --
If we use Expression then either:
* Dataset.hint parameters should be Expression too, in which case you can't
do `df.hint("hint", 1, 2, "c")` you'd have to do `df.hint("hint", Literal(1),
Literal(2), Literal("c"))` or a shortcut if there is
* Dataset.hint accepts Any but then has to convert Any to Expressions. One
problem here is that Seq(1,2,3) can't be converted to Literal. So you have to
use `df.hint("hint", Array(1,2,3))`
The disadvantage of have Any in UnresolvedHint is that to resolve the hint
you have to check both for String and Literal(String) but the API is easier to
use.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
